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Topic: 1915 557cc Piston measurements/details (Read 180 times)

Hello,I am restoring a 1915 557cc engine which needs a new piston.The current piston is not the original and may not be correct.I need to confirm the measurement from the gudgeon pin to the top of the piston (flat top)Would anyone have any copies of original drawings/details/measurements of the pistons,particularly the height from the gudgeon to the top of the piston?